One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,13)(8,12)(9,11)(10,15)(14,20)(16,18)(17,19)(22,26)(23,30)(27,29)(31,36) involution — undirected(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(21,22,24,26)(23,28,30,33)(25,27,32,29)(31,34,36,35)(2,4)(22,27)(23,30)(25,32)(26,29)(28,35)(33,34) involution — undirected(6,11)(10,13)(12,19)(18,20)(21,23)(22,28)(24,30)(25,31)(26,33)(27,34)(29,35)(32,36) involution — undirected(5,8,9,17)(6,12,11,19)(7,14,15,16)(10,18,13,20)(22,29)(23,30)(25,32)(26,27)(28,34)(33,35)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.